According to a press release today by The Interactive Advertising Bureau (IAB), they and PricewaterhouseCoopers (PwC) performed a joint study and found that Internet advertising revenues for 2005 are estimated to exceed $12.5 billion.
… a 30% increase over the previous revenue record of $9.6 billion in 2004. The 2005 Q4 revenues totaled a record $3.6 billion; making it the second consecutive quarter to surpass the $3 billion mark and the highest quarter reported. Fourth quarter revenues represent a 35 percent increase over the same period in 2004 and a 17 percent increase over Q3 of 2005.
I wonder what the split is between search based advertising and banner advertising — perhaps the IAB can tell us when their report is made available in April.